The occurrence of endemic species in South America and Australia is due to  

1. Extinction of these species from other regions

2. Continental separation

3. No terrestrial route to these places

4. Retrogressive evolution 

Subtopic:  Concept of Speciation |
 74%
From NCERT
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Genetic drift is change of 

1. gene frequency in same generation 

2. appearance of recessive genes

3. gene frequency from one generation to next 

4. None of the above

Subtopic:  Sources of Variation: 2 | Sources of Variation |
 60%
From NCERT
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Thorn of Bougainvillea and tendril of Cucurbita are examples of  
1. analogous organs

2. homologous organs

3. vestigial organs

4. retrogressive evolution 

Subtopic:  Concept of Organic Evolution: Evidence: 1 | Concept of Organic Evolution: Evidence |
 84%
From NCERT
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Adaptive radiation refers to

1. adaptations due to geographical isolation 

2. evolution of different species from a common ancestor

3. migration of members of a species to different geographical areas

4. power of adaptation in an individual to a variety of environments

Subtopic:  Concept of Organic Evolution: Evidence: 2 | Concept of Organic Evolution: Evidence |
From NCERT
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Random genetic drift in a population probably results from   

1. large population size

2. highly genetically variable individuals

3. interbreeding within small isolated population 

4. constant low mutation rate

Subtopic:  Sources of Variation: 2 | Sources of Variation |
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Which one of the following features is closely related with the evolution of humans?

1. Loss of tail                         

2. Shortening of jaws

3. Binocular vision                   

4. Flat nails

Subtopic:  Introduction to Human Evolution |
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Homo sapiens evolved during

1. Pleistocene 

2. Oligocene

3. Pliocene 

4. Miocene

Subtopic:  Evolution of Homo Sapiens |
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Identify the correct sequence in which the following substances have appeared during the course of evolution of life on earth.

1. glucose, amino acids, nucleic acids, proteins

2. ammonia, amino acids, proteins, nucleic acids

3. water, amino acids, nucleic acids, enzymes

4. amino acids, ammonia, phosphates, nucleic acids

Subtopic:  Origin of Life: Chemical Evolution: 1 | Origin of Life |
 52%
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In which condition the gene ratio remains constant for any species?

1. Sexual selection

2. Random mating

3. Mutation

4. Gene flow

Subtopic:  Hardy Weinberg Law: 1 | Hardy Weinberg Law |
 54%
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Darwin's theory of pangenesis shows similarity with theory of inheritance of acquired characters then what will be correct according to it?

1. Useful organs become strong and developed while useless organs become extinct. These organs help in struggle for survival

2. Size of organs increase with ageing

3. Development of organs is due to will power

4. There should be some physical basis of inheritance

Subtopic:  Drawbacks of Darwin's Theory |
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